Box Definition and 1000 Threads

A box (plural: boxes) is a type of container or rectangular prism used for the storage or transportation of its contents. The size of a box may vary, from the very smallest (such as a matchbox) to the size of a large appliance, and can be used for a variety of purposes ranging from the functional to the decorative.
Boxes may be made of a variety of typically durable materials, such as wood and metal, though common non-durable materials include corrugated fiberboard and paperboard. Corrugated metal boxes are commonly used as shipping containers. Boxes made of cardboard can be degraded and therefore are not bad for the environment.
Boxes are typically rectangular in shape with a rectangular cross-section, though a box may also have a square, elongated, circular or oval appearance; boxes may also feature sloped or domed top surfaces, or vertical edges, and are not consistently made in a square fashion. Square and rectangular boxes are still much more common than its other various shapes that it could come in.
Boxes may be closed and shut with flaps, doors, or a separate lid. They can be secured shut with adhesives, tapes, or more decorative or elaborately functional mechanisms, such as a catch, clasp or lock.

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  1. M

    Solving for Temperature in a Heat Dissipation Box

    Hi all I need an some help on thermodynamics. I want to install a camera outside of my house, but the camera can only operate between 0 and +55 degrees celsius. Now I want to make an isolating box around it, and wanted to calculate how thick the material of the box should be to allow outside...
  2. U

    Rectangular box tips over (or not)

    Homework Statement A uniform rectangular wood block of mass M, with length b and height a, rests on an incline as shown. The incline and the wood block have a coefficient of static friction, μs. The incline is moved upwards from an angle of zero through an angle θ. At some critical angle the...
  3. B

    Minimum bounding box problem

    Hi, I'm working at a small company currently trying to create a casting mould for double curved surfaces. I'm in charge of programming, and I'm creating a plugin for Rhino which is supposed to take a double curved panel and reorient it to the xy-plane from where it is read and sent to our...
  4. P

    F = ma 2007 Exam - Question #25 - SHM with a box in water

    Homework Statement Find the period of small oscillations of a water pogo, which is a stick of mass m in the shape of a box (a rectangular parallelepiped.) The stick has a length L, a width w and a height h and is bobbing up and down in water of density ρ. Assume that the water pogo is...
  5. N

    A fast image recognition algorithm for box?

    If you have an image (just black and white) with a box SOMEWHERE in the image, but there's also some noise in the image, is there a good way to find four corners? I'm sure someone has herd of an algorithm for this, it would just be good if I had a direction to go in.
  6. J

    Box resting on an inclined plane

    Homework Statement A box with a mass of 22kg is at rest on a ramp inclined at 45 degrees to the horizontal. The coefficient of static friction is 0.78 determine the magnitude of the smallest force that can be applied onto the top of the box, perpendicular to the ramp if the box is to...
  7. C

    Calculate the maximum force required to accelerate the box

    Homework Statement Calculate the maximum force required to accelerate the box from rest and not move the glass on it's surface on top of the box. I am given the mass of the box and glass, and both the static and kinetic coefficients of both objects. I have to create a spreadsheet that can...
  8. S

    LaTeX How to draw box for my math equation in latex

    I want to enclose my final equation inside a box but i find no way to do that in latex. please help me out as soon as possible. Thanks!
  9. T

    Combinatorics - box of white and black screws

    Homework Statement The screwengineer Pelle has a box with 16 black screws and 16 white screws. a. In how many ways can he pick an even(at least 2) amount of screws from the box? b. Pelle randomly chooses one of the alternatives in (a), what's the chance that gets as many white as black...
  10. R

    Job search question Out of the box opportunities for EE graduates

    I'm going to finish my undergrad in about 3 semesters, and I've come to realize through school and internships that if I have to do any programmming for a full-time job upon graduation, I will go insane. So my question is this, and the answer may be a simple 'no, that's ridiculous'. Are there...
  11. M

    Lorentzian contraction of a box increases the pressure inside?

    Lorentzian contraction of a box increases the pressure inside? I have been doing some research on gravity, and I am having a very hard time with the following example I found in a book entitled Gravity From the Ground Up by Bernard Schutz. It sounds like a 3rd grader explaining...
  12. Elroch

    Can pressure cause gravity in a box of light?

    Imagine a perfectly reflecting box with a homogenous distribution of photons within it with total energy E (not entirely sure how close to possible this is, but don't worry about that). I would have thought this box's gravitational field would be very much like the combination of the the box's...
  13. T

    Particle in a Box: Solving for Acceptable Wave Function with Boundary Conditions

    Homework Statement V(x) = 0 if \frac{-L}{2}<x<\frac{L}{2} and \infty otherwise. Is the wave function \Psi = (2/L)^{1/2} (sin (\pix/L) an acceptable solution to this? Explain Homework Equations H\Psi= E\Psi , normalization: 1 = \int wavefunction^{2}dx The Attempt at a Solution...
  14. B

    Box being pushed up an inclined plane

    Homework Statement A 250N force is directed horizontally to push a 29kg box up a plane that is inclined at 27 degrees to the horizontal. the box moves up the plane at a constant speed. Determine the magnitude of the normal force, and the coefficient of kinetic friction. g=9.8m/s^2 a(y) =...
  15. Z

    Determining Ground State Configuration in 2D Square Well with Aufbau Process

    Homework Statement use the Aufbau process to determine the ground state electronic configuration for the 2D sqare well if it contains 4 electrons. what is the multiplicity of the ground state electronic configuration? what is the energy of this 2 D 4 electrons system? and is the system...
  16. C

    Accelerate 6kg & 4kg Blocks: Instantaneous Force of 60N

    Hello friends I have a problem.please give me the answer. Two blocks of masses 6kg and 4kg connected by a rope are resting on frictionless floor.If an instantaneous force of 60N is applied to 6kg block for only a second.Then what is the acceleration of the first and second block.Is the...
  17. L

    A box attached to a pulley on a ramp

    Homework Statement Mass of box: 27.0 kg mass of bucket attached to pulley: 25.0 kg incline:35 degrees static friction:.650 kinetic friciton: .490 Okay, there is a box on an incline. The box is attached to a pulley. A bucket is attached to the other end of the pulley. The bucket is going...
  18. C

    Water Pressure in Box: Calculating Perspex Thickness

    Dear All I have approximately 300liters of water that I would like to house in a box. However I would like to check up on my water every now and again so I would like to make it out of clear perspex/acrylic. I could make it out of glass, but perspex is cheaper and easier for me to handle...
  19. S

    Wave box with constant amplitude and velocity

    hello I need to informations about soliton. I know that soliton is a wave box with constant amplitude and velocity. but this datas cannot answer my requirement. piease help me fast.
  20. P

    Determine the frictional force acting on the box

    Homework Statement determine the magnitude of the frictional force acting on the box on the plane Homework Equations f=ma The Attempt at a Solution no clue. help ??
  21. O

    Stat Mech : Balls in a box counting problem

    Homework Statement I already have the solution to the problem. Just need some help deciphering the logic behind it. There are V balls, which are identical except for their color. N of them are blue and V-N are red. We place the balls inside a box so that V/2 balls are on each side...
  22. R

    Light Reflection in a Mirror Cube

    not sure if this is posted, so imagine i have a 3- dimensional cube. let's say its about 10m x 10m x 10m in volume. this cube is empty on the inside but its inner surface is covered with mirrors. normal plane mirrors all around the walls, like tiles but instead mirrors. so what happens if i...
  23. G

    Maximizing Energy Transfer in a Compressed Spring System

    Homework Statement A spring with a force constant of 225 N/m is resting on a friction-less surface and mounted against a wall horizontally. A 1.5 kg box is pushed against the spring and compresses it 12 cm (0.12m) from equilibrium. When released the spring pushes the box across the...
  24. N

    Throwing speed question (ball and a box)

    Homework Statement A ball was thrown into a box. Determine Ek, P, and throwing speed when the: mass of softball = 172.7g mass of packed box = 2,043.5g and the box moved from 0 cm to 2cm. and the spring scale that remained parallel to the floor was Ff=8N. Homework Equations Ff=\muFn Velocity...
  25. W

    Pulling a Sled & Box up a Snowy Hill

    Homework Statement A rope attached to a 19.0kg wood sled pulls the sled up a 22.0 degree snow-covered hill. A 11.0 kg wood box rides on top of the sled. Homework Equations I have no what the equation may be, I was just doing some research and came across this website plus others and...
  26. teroenza

    Assigning spin values to particle in a box.

    Homework Statement Imaging an particle with spin 3/2 confined in a one-dimensional rigid box/ What are the degeneracies of its energy levels? Make a sketch of the lowest few levels, showing their occupancy for the lowest state of six electrons confined in the same box. (Ignore the Coulumb...
  27. teroenza

    Electron in a 1-D box. Quantum Numbers

    Homework Statement Imaging an electron (s=1/2) confined in a one-dimensional rigid box/ What are the degeneracies of its energy levels? Make a sketch of the lowest few levels, showing their occupancy for the lowest state of six electrons confined in the same box. (Ignore the Coulumb...
  28. T

    Tension of 10 m rope hung across 6 m horizontal distance with 50 kg box hanging

    Homework Statement A rope is 10.0 m long and is attached at points A and B, which are at the same elevation 6.0 m apart. If a 50.0 kg mass is attached to the rope 4.0 m away from point A, what is the tension in the two segments of the rope? Homework Equations W = ma ƩFy = 0 = T1 + T2 - W...
  29. L

    Box on a string, find displacement when first at rest

    Homework Statement A block with mass m = 3.57 kg is attached to a spring with spring constant k = 165.7 N/m and negligible mass. The coefficient of kinetic friction between the block and the table is µk = 0.239. The box is displaced from its equilibrium position to the left by 0.216 m. If the...
  30. S

    How can I create a 24V control/test box with +/- 10 VDC output and test points?

    Hey, all. I've got a project that I need to do for work, but I'm not sure where to start. I need to design and build a box that will run on and put out 24 VDC, but also be able to put out +/- 10 VDC. The current does not go above 2 amps. It will also need to have test points to monitor the...
  31. W

    Designing a Box to Catch an Unadulterated Egg at 18ft

    So. This annoying project attack's again. I have to create a box to catch an unadulterated egg at the base of my school balconies. Starting at 18 ft. I have no clue were to even start! worse part, its due very soon and my 'group' refuses to help. I do not know what to do. my only limits are the...
  32. B

    Finding Δx of a box sliding down an inclined plane using Work theory.

    Homework Statement A box of mass m with an initial velocity of v0 slides down a plane, inclined at θ with respect to the horizontal. The coefficient of kinetic friction is μ. The box stops after sliding a distance x. How much work is done by friction? Homework Equations...
  33. E

    Black Box Theory: Am I Understanding It Correctly?

    If I understand the Black Box Theory correctly, I should be able to put a set of musical patterns into the black box. This will give me predictable outcomes based on data entered. The more patterns the more predictable the outcome. Am I close?
  34. 1

    An airtight box, having a lid of area 80 cm2, is partially evacuated.

    Homework Statement An airtight box, having a lid of area 80 cm2, is partially evacuated. Atmospheric pressure is 1.01 105 Pa. A force of 108 lb is required to pull the lid off the box. The pressure in the box was: Homework Equations The Attempt at a Solution I figure that the...
  35. P

    How much force is needed to tip a box with given dimensions and weight?

    Homework Statement Hello, its been a long time since I've worked with statics or dynamics in college and now find myself in the workfield trying to figure out a current problem! What I am looking for is how much force is needed to tip a box. The box i have has dimensions of: Length=400in...
  36. I

    Box Problem Kinetic/Static Friction

    Here's the question: Two boxes are placed on top of one another. The top box has a weight of 20 N and the bottom box has a weight of 50 N. You can neglect friction between the bottom box and the floor, but uS = 0.5 and uK = 0.4. You can assume g = 10m/s^2. Both boxes are initially at rest...
  37. E

    Finding F required pushing a box at angle (theta) for constant v

    Homework Statement a crate with mass m rests on a horizontal floor. a woman pushes down at an angle of theta below the horizontalon the frace with a force F, the coefficient of kinetic friction is Uk. a) what magnitude of force F is required to keep the crate moving at a constant velocity...
  38. B

    What is the meaning of 'box' in Wess and Bagger's chiral superfield theory?

    Hi, I apologize if this question has been asked before or if it is dumb, but... I'm trying to learn some supersymmetry and have been working through Wess and Bagger. However, I have become confused in chapter 9, when they calculate the propagators of a free chiral superfield theory. My...
  39. B

    Max Heat Leak in a Refrigerator: 0.25 HP Motor & -20ºC Box

    Homework Statement A refrigerator is operated by a 0.25 horsepower motor. If the interior of the box is to be maintained at –20ºC against a maximum exterior temperature of 35ºC, what is the maximum heat leak (in watts) into the box that can be tolerated if the motor runs continuously...
  40. S

    (torque) a force needed for wheel to rise up onto box

    ok this was a problem in my book and the answer apparently is 29N. I have the diagram and pictures below. I know that the pivot point will be the edge of the block that is touching the outside of the wheel. When the wheel is in equilibrium the sum of the torque will=zero so i can set up the...
  41. schrodingerscat11

    Compare Box Plots: Different # of N?

    Is it okay to compare box plots with different number of data (number of n)? Thank you very much.
  42. U

    Solving Box Motion with Applied Force

    Homework Statement A 3.10 box is moving to the right with speed 8.50 on a horizontal, frictionless surface. At t=0, a horizontal force is applied to the box. The force is directed to the left and has magnitude F(t)= (6.00 N/s^2)t^2 What distance does the box move from its position at...
  43. P

    Box normalization of plane wave

    Hi everybody. I'm beginning my first course on quantum physics, and our professor introduced the box normalization for plane waves. My question is: why do we need to impose conditions on the borders? I haven't been able to find any explanation on the internet, as every text I found just...
  44. J

    Schrodinger Equation: Particle in a Box

    Homework Statement We have been examining a one-dimensional infinite square well where the infinite walls are located at -b and +b. The energy levels in this quantum system are non-degenerate, that is for each energy there is only one wave function. Let us place an infinite potential step...
  45. B

    Box and friction distance problem?

    Homework Statement A box is sliding up an incline that makes an angle of 17.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s. How far does the...
  46. N

    Problem of finding the volume of a box.

    Homework Statement The airlines accept a box if length + width + height <= 62. If h is fixed, show that the maximum volume (62-w-h)wh is V = h(31 - h/2)^2. The Attempt at a Solution Well, I multipied: V(h) = (62-w-h)wh V(h) = 62wh - w^2h - wh^2 dv/dt = 62w - w^2 - 2w = 60w - w^2 0 = 60w...
  47. B

    Box sliding down an inclined plane

    Homework Statement A 2kg box is at the top of an inclined plane that is 10m long. The inclined plane makes an angle of 30° with the ground. The μk of the ramp is 0.36 and the μk of the flat ground at the end of the ramp is 0.50. How far does the box travel along the flat ground until it stops...
  48. J

    Variational method particle in box approx.

    Homework Statement use the variational method to approximate the ground state energy of the particle in a one-dimentional box using the normalized trial wavefunction ∅(x)=Nx^{k}(a-x)^{k} where k is the parameter. Demonstrate why we choose the positive number rather than the negative...
  49. D

    Inclined Plane Question. What force is necessary to keep the box from sliding?

    "A loaded penguin sled weighing 69 N rests on a plane inclined at angle θ = 22° to the horizontal. Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.20. (a) What is the minimum magnitude of the force , parallel to the...
  50. P

    Spring on a ramp to launch a box

    1. Homework Statement A spring on a wooden ramp has a spring constant of 453 N/M. A small cube is to be launched and has a mass of 97 grams. Ramp angle from the horizontal is 52 degrees above the horizontal. For simplicity, assume that the part of the wooden ramp which is underneath the...
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